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Do climate and fishing influence size-based indicators of Celtic Sea fish community structure?

Citation

Blanchard, JL and Dulvy, NK and Jennings, S and Ellis, JR and Pinnegar, JK and Tidd, A and Kell, LT, Do climate and fishing influence size-based indicators of Celtic Sea fish community structure?, ICES Journal of Marine Science, 62, (3) pp. 405-411. ISSN 1054-3139 (2005) [Refereed Article]

Copyright Statement

Crown Copyright 2005

DOI: doi:10.1016/j.icesjms.2005.01.006

Abstract

Ecosystem-based management requires the development of indicators that allow anthropogenic impacts to be detected against the background of natural variation. Size-based community metrics are potentially useful indicators because of their theoretical foundation and practical utility. Temporal and spatial patterns in size-based community metrics for Celtic Sea fish are described and calculated using data from the English groundfish survey of the area (1987-2003). The results reveal that the size structure of the community has changed over time, and that a decrease in the relative abundance of larger fish was accompanied by an increase in smaller fish (4-25 g). Temporal analyses of the effects of fishing and climate variation suggest that fishing generally has had a stronger effect on size structure than changes in temperature. Therefore, size-based metrics respond clearly to the effects of fishing even in variable environments, reflecting the ubiquity of size-based processes in defining community structure and responses to mortality. Spatial analyses were inconclusive, probably owing to the limited area for which fishing effort, temperature, and survey data were all available.

Item Details

Item Type:Refereed Article
Keywords:ecological indicators, climate change and fishing impacts
Research Division:Environmental Sciences
Research Group:Ecological Applications
Research Field:Ecological Impacts of Climate Change
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management at Regional or Larger Scales
Author:Blanchard, JL (Dr Julia Blanchard)
Author:Tidd, A (Dr Alexander Tidd)
ID Code:100511
Year Published:2005
Web of Science® Times Cited:102
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2015-05-18
Last Modified:2017-05-04
Downloads:0

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